Festival Speech Synthesis System: - Speech Resource Pages

(
)
(vc + -) ;; vowel consonant
(vlength short long diphthong schwa 0) ;; vowel length
...
The third section is a list of phone definitions themselves. Each phone definition consists of a phone name and the
values for each feature in the order the features were defined in the above section.
A typical example of a phoneset definition can be found in `lib/mrpa_phones.scm'.
Note the phoneset should also include a definition for any silence phones. In addition to the definition of the set the
silence phone(s) themselves must also be identified to the system. This is done through the command
PhoneSet.silences. In the mrpa set this is done by the command
(PhoneSet.silences '(#))
There may be more than one silence phone (e.g. breath, start silence etc.) in any phoneset definition. However the
first phone in this set is treated special and should be canonical silence. Among other things, it is this phone that is
inserted by the pause prediction module.
In addition to declaring phonesets, alternate sets may be selected by the command PhoneSet.select.
Phones in different sets may be automatically mapped between using their features. This mapping is not yet as
general as it could be, but is useful when mapping between various phonesets of the same language. When a phone
needs to be mapped from one set to another the phone with matching features is selected. This allows, at least to
some extent, lexicons, waveform synthesizers, duration modules etc. to use different phonesets (though in general
this is not advised).
A list of currently defined phonesets is returned by the function
(PhoneSet.list)
Note phonesets are often not defined until a voice is actually loaded so this list is not the list of of sets that are
distributed but the list of sets that are used by currently loaded voices.
The name, phones, features and silences of the current phoneset may be accessedwith the function
(PhoneSet.description nil)
If the argument to this function is a list, only those parts of the phoneset description named are returned. For example
(PhoneSet.description '(silences))
(PhoneSet.description '(silences phones))
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13. Lexicons
A Lexicon in Festival is a subsystem that provides pronunciations for words. It can consist of three distinct parts: an
addenda, typically short consisting of hand added words; a compiled lexicon, typically large (10,000s of words)
which sits on disk somewhere; and a method for dealing with words not in either list.
13.1 Lexical entries Format of lexical entries